20-25 Year Follow-Up on Regenerative Bone Procedures for Peri-Implantitis

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ENROLLING_BY_INVITATION

Total Enrollment

20 participants

Study Classification

OBSERVATIONAL

Study Start Date

2025-08-31

Study Completion Date

2025-12-31

Brief Summary

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The goal of this 20-25-year observational study is to investigate the outcomes of bone regenerative surgery in peri-implantitis. Two different techniques will be compared: surgery with a bone substitute alone and surgery with a bone substitute combined with a membrane, to determine their effectiveness and assess whether one is more effective than the other. The intention of this observational study is to learn more about the long-term effects of bone regenerative surgery in patients with peri-implantitis.

Patients will be called in for a clinical and radiographic examination of the surgically treated implant(s). Probing pocket depths, presence of pus, bleeding around the implant (s) and a radiograph of the implant (s).

To be able to compare with the 1, 3, 5 and 10 year measurements.

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Detailed Description

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The aim of this 20-25 year observational follow-up study is to investigate the outcomes of bone regenerative surgery in peri-implantitis. The study compares two approaches: Group 1: surgery with a bone substitute alone (Algipore) and Group 2: surgery with a bone substitute (Algipore) combined with a membrane (Osseoquest). Both groups received systemic antibiotics-Amoxicillin 375 mg three times a day combined with Metronidazole 400 mg twice a day for 10 days, starting the day before surgery.

The objective of this observational study is to gain insights into the long-term effects of bone regenerative surgery in patients with peri-implantitis and to determine if there is a difference.

The patients were enrolled in a strict maintenance program with supportive therapy every third months with a yearly evaluation.

In this study, patients will examined of the surgically treated implant(s) after 20-25 years. The examination will include a clinical assessment, measuring probing pocket depths at each implant to the nearest millimeter using a standardized probing force of 0.25 N (Hawe-Click Probe, Kerr Hawe SA Bioggio, Switzerland). The prevalence of pus, full-mouth bleeding on probing, and bleeding grades will be recorded around the implant(s) at four sites per tooth and implant(s) as follows: 0 = no bleeding, 1 = point of bleeding, 2 = line of bleeding, and 3 = drop of bleeding. The plaque index will be defined as either visible or not visible at the implant site using an erythrosine dye (TopDent Lifco Dental AB, Enköping, Sweden). All clinical assessments will be performed by the same periodontist (AMRJ).

Data from the clinical treatment were registered in patient records. In parallel, clinical data were documented in a study protocol and saved in a safe in accordance with standard operation procedure at the clinic.The protocol with medical records were not opened until the study was completed and only by authorized persons with access to the data in the study such as, principal investigator and statisticians.

In accordance with an international working group diagnosis of peri-implantitis should include pocket depth, bleeding, and bone loss (X-ray). Thus, in this study the primary outcomes are radiographic evidence of bone fill and changes in probing depths at implants treated.

Parametric tests (independent t-tests, equal variance not assumed), and non-parametric tests (Mann-Whitney U-test, Wilcoxon test) will be performed to assess differences over time and between groups. Statistical significance will be declared at p \<0.05. The Kolmogorov- Smirnov test will be used to define if the data presented with normal distribution or not. The SPSS PASW 29.0 statistical software (SPSS Inc., Chicago, IL, USA) for Apple computer will be used in the analysis.

Patients that will participate in the study will consecutively be given an ID code. and data will be registered in the ordinary patient journal. The code list will be placed in a locked up space, at the clinic.

All patients will be given oral and written information about the study and will sign a written informed consent. The patients will be informed that they could drop off when ever they want without any explanations. The ethical board approved the study.

Conditions

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Peri-implantitis

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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Group 1

Bone regenerativ surgery with a bone graft material (Algipore) and a resorbable membrane (Osseoquest)

Bone regenerative surgery with a bone graft substitute and a resorbable membrane

Intervention Type PROCEDURE

Dental implants with a diagnosis peri-implantitis were treated with regenerative surgery.

Group 2

Bone regenerativ surgery with a bone graft material (Algipore)

No interventions assigned to this group

Interventions

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Bone regenerative surgery with a bone graft substitute and a resorbable membrane

Dental implants with a diagnosis peri-implantitis were treated with regenerative surgery.

Intervention Type PROCEDURE

Other Intervention Names

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Bone regenerative surgery with a bone graft substitute

Eligibility Criteria

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Inclusion Criteria

* An implant demonstrating a progressive bone loss of ≥3 threads (≥1.8 mm) following the first year of healing
* A vertical component needed to be present at the surgical intervention in order to justify the use of a bone augmentation procedure.
* Bleeding on probing and/or suppuration should also be present